/*
 * Copyright (C) 2008 Esmertec AG. Copyright (C) 2008 The Android Open Source Project Licensed under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at
 * http://www.apache.org/licenses/LICENSE-2.0 Unless required by applicable law or agreed to in writing, software distributed under
 * the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations under the License.
 */

package com.chuantou.yuba.db.util;

import java.util.ArrayList;
import android.content.ContentProviderOperation;
import android.content.ContentProviderResult;
import android.content.ContentResolver;
import android.content.ContentValues;
import android.content.Context;
import android.content.OperationApplicationException;
import android.database.Cursor;
import android.database.sqlite.SQLiteException;
import android.net.Uri;
import android.os.RemoteException;
import android.util.Log;
import android.widget.Toast;

/**
 * @hide
 */

public final class SqliteWrapper {
    private static final String TAG = "SqliteWrapper";

    private static final String SQLITE_EXCEPTION_DETAIL_MESSAGE = "unable to open database file";

    private SqliteWrapper() {
        // Forbidden being instantiated.
    }

    // FIXME: need to optimize this method.
    private static boolean isLowMemory(SQLiteException e) {
        return e.getMessage().equals( SQLITE_EXCEPTION_DETAIL_MESSAGE);
    }

    public static void checkSQLiteException(Context context, SQLiteException e) {
        if(isLowMemory( e)) {
            Toast.makeText( context, "com.android.internal.R.string.low_memory", Toast.LENGTH_SHORT).show();
        }
        else {
            throw e;
        }
    }

    public static Cursor query(Context context, ContentResolver resolver, Uri uri, String[] projection, String selection,
        String[] selectionArgs, String sortOrder) {
        try {
            long time = System.currentTimeMillis();
            Cursor c = resolver.query( uri, projection, selection, selectionArgs, sortOrder);
            // Log.i("scanapp", "query: " + uri.toString() + "     use time = " + (System.currentTimeMillis() - time));
            return c;
        } catch(SQLiteException e) {
            Log.e( TAG, "Catch a SQLiteException when query: ", e);
            checkSQLiteException( context, e);
            return null;
        }
    }

    @SuppressWarnings("deprecation")
    public static boolean requery(Context context, Cursor cursor) {
        try {
            return cursor.requery();
        } catch(SQLiteException e) {
            Log.e( TAG, "Catch a SQLiteException when requery: ", e);
            checkSQLiteException( context, e);
            return false;
        }
    }

    public static int update(Context context, ContentResolver resolver, Uri uri, ContentValues values, String where,
        String[] selectionArgs) {
        try {
            return resolver.update( uri, values, where, selectionArgs);
        } catch(SQLiteException e) {
            Log.e( TAG, "Catch a SQLiteException when update: ", e);
            checkSQLiteException( context, e);
            return -1;
        }
    }

    public static int delete(Context context, ContentResolver resolver, Uri uri, String where, String[] selectionArgs) {
        try {
            return resolver.delete( uri, where, selectionArgs);
        } catch(SQLiteException e) {
            Log.e( TAG, "Catch a SQLiteException when delete: ", e);
            checkSQLiteException( context, e);
            return -1;
        }
    }

    public synchronized static Uri insert(Context context, ContentResolver resolver, Uri uri, ContentValues values) {
        try {
            return resolver.insert( uri, values);
        } catch(SQLiteException e) {
            Log.e( TAG, "Catch a SQLiteException when insert: ", e);
            checkSQLiteException( context, e);
            return null;
        }
    }

    /**
     * 批量插入
     * @param context
     * @param resolver
     * @param uri
     * @param operations
     * @return
     */
    public synchronized static int applyBatch(Context context, ContentResolver resolver, Uri uri,
        ArrayList<ContentProviderOperation> operations) {
        try {
            ContentProviderResult[] result = resolver.applyBatch( uri.getAuthority(), operations);
            return result == null ? 0 : result.length;
        } catch(RemoteException e) {
            e.printStackTrace();
            return 0;
        } catch(OperationApplicationException e) {
            e.printStackTrace();
            return 0;
        }
    }
}
